Improvement in spark-arresters



J. T. GONNELLY 8v H G. HUSTON.

Spark-Arr'ester.

' Patent e d April 30,1878.

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ATTORNEYS WITNESSES ja /M N. PETERS PHOTULIJKHOGRAPHER WASHINGTON. D. c.

UNITED STATES PATENT OFFICE- JAMES T. GON'NELLY AND HENRY G. HUSTON, OFGONNELLSVILLE, PA.

IMPROVEMENT IN SPARK-ARRESTERS.

S pecification forming part of Letters Patent No. 203,121, dated April30, 1878; application filed March 30, 1878.

To all whom it may concern:

Be it known that we, J Alvms T. CONNELLY and HENRY O. HUsroN, ofGonnellsville, in the county of Fayette and State of Pennsylvania, haveinvented a new and valuable Improvement in Spark-Arresters; and we dohereby declare that the following is a full, clear, and exactdescription of the construction and operation of the same, referencebeing had to the annexed drawing, making a part of this specification,and to the letters and figures of reference marked thereon.

The figure of the drawing is a representation of a vertical section ofour spark-arrester.

The nature of our invention consistsin the construction and arrangementof a spark-arrester, as will be hereinafter more fully set forth.

The annexed drawing, to which reference is made, fully illustrates ourinvention.

A represents the smoke-stack, provided at its upper end with the usualenlarged cappiece B, made in the form of two truncated cones placed withtheir larger ends together.

In the stack A are secured vertical rods to 0,, extending upward for asuitable distance, and to the same is secured a barrel or cylinder, U C,of about the same interior diameter as the stack A. The upper part, 0,of the barrel is of wire-netting, and the lower part, 0, is of sheetmetal, and is arranged at such a point as to leave a suitable space, atb, between the lower end of the barrel and the upper end of the stack A.

0n the upper ends of the rods a a is secured a cap, D, having a centraldownwardly-projecting cone, D, and around the edges of this cap isfastened a rim, D of wire-netting, which extends over and below thewire-netting G of the barrel, substantially in the manner shown.

The conical cap D D stops the sparks, forcin g them downward, while thenetting D attached thereto, greatly facilitates the draft, giving thesmoke and fine dust the fullest chance to pass out, the large sparksbeing driven up again by the exhaust-steam, to be broken until they areso fine that they, too, pass out with the smoke.

The sheet-iron part O of the barrel is placed together in such a way asto leave enough space for the sparks coming down from the cone betweenthe nettings G D to pass at b into the lower barrel or stack, to bedriven up again by the exhaust-steam.

At the junction of the stack A and cap-piece or head B is an interiorcircumferential flange, d, as shown, which prevents the exhaust-steamfrom passing in at b.

By our construction of the spark-arrester a great saving of fuel iseffected by having a greatly-improved draft. It throws no dust, and letsno dust down into the smoke-box.

What we claim as new, and desire to secure by Letters Patent, isl Thecombination, with the stack A, provided with flange d, and its cap orhead B, of

the sheet-metal barrel 0, having upper wirenetting extension 0, andforming a passage, 1), at its lower end, the cone D D, and wirenetting Dall constructed and arranged substantially as and for the purposesherein "set forth.

In testimony that we claim the above we have hereunto subscribed ournames in the presence of two witnesses.

JAMES T. GONNELLY. HENRY O. HUSTON.

Witnesses T. A. SIMONs, A. B. MORTON.

